Need to pour a cement slab for mobile home 32+76 pad .can i go with 4'' slab with wire mash ground is red clay?

Make sure you put down a suitable stone base- 2B limestone and make sure you have adequate expansion joints...depending on weight of home will determine the mix you will need. for example a 3500 psi blend will support 3500 lbs. per sq inch. for increased strength have plant add fiber strands to the mix.